This is where many people feel like their relationships take a “turn.” Somewhere along the relationship one person realizes, “wait this isn't me at all.” They had all good intention. They just know themselves well enough.

Such revelation can come at any time.

So, “No,” there is no perfect time when a relationship will turn. It all depends on how self aware and honest the parties are.

Ideally you both are so self evolved that the relationship never turns, but if by chance it does- bless the lesson, bless the love, and get out of Dodge. No one needs negativity in their life.